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Titolo:
THE EFFECT OF CONTACT TIME BETWEEN CATIONIC POLYMERS AND FURNISH ON RETENTION AND DRAINAGE
Autore:
FORSBERG S; STROM G;
Indirizzi:
SCA RES AB,BOX 3054 S-85003 SUNDSVALL SWEDEN INST SURFACE CHEM S-11486 STOCKHOLM SWEDEN
Titolo Testata:
Journal of pulp and paper science
fascicolo: 3, volume: 20, anno: 1994,
pagine: 100000071 - 100000076
SICI:
0826-6220(1994)20:3<100000071:TEOCTB>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
ADSORPTION; ADDITIVES; KINETICS;
Keywords:
FURNISH; RETENTION AIDS; DRAINAGE AIDS; POLYACRYLICS; ACRYLAMIDE; TIME; STARCH; CATIONIC COMPOUNDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
S. Forsberg e G. Strom, "THE EFFECT OF CONTACT TIME BETWEEN CATIONIC POLYMERS AND FURNISH ON RETENTION AND DRAINAGE", Journal of pulp and paper science, 20(3), 1994, pp. 100000071-100000076

Abstract

The effect of the contact time between cationic polymers (polacrylamides and cationic starches) and stock on retention and dewatering has been studied using a new type of equipment. Dewatering is carried out under low pressure and the addition of chemicals and other operations are controlled by a microprocessor The retention often shows a maximum after a polymer contact time of 10-20 s. It is found that long contacttimes drastically reduce the effect of the added polymer. This is explained as being due to floc rupture, degradation of the polymer and poor reflocculation. The dewatering time is extremely sensitive to the polymer contact time and increases steadily with increasing contact time.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 11:26:32